text: /* Tests for pread and pwrite.
     Copyright (C) 1998-2016 Free Software Foundation, Inc.
     This file is part of the GNU C Library.
     Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.
  
     The GNU C Library is free software; you can redistribute it and/or
     modify it under the terms of the GNU Lesser General Public
     License as published by the Free Software Foundation; either
     version 2.1 of the License, or (at your option) any later version.
  
     The GNU C Library is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     Lesser General Public License for more details.
  
     You should have received a copy of the GNU Lesser General Public
     License along with the GNU C Library; if not, see
     <http://www.gnu.org/licenses/>.  */
  
  #include <errno.h>
  #include <error.h>
  #include <string.h>
  #include <unistd.h>
  
  
  /* Allow testing of the 64-bit versions as well.  */
  #ifndef PREAD
  # define PREAD pread
  # define PWRITE pwrite
  #endif
  
  #define STRINGIFY(s) STRINGIFY2 (s)
  #define STRINGIFY2(s) #s
  
  /* Prototype for our test function.  */
  extern void do_prepare (int argc, char *argv[]);
  extern int do_test (int argc, char *argv[]);
  
  /* We have a preparation function.  */
  #define PREPARE do_prepare
  
  /* We might need a bit longer timeout.  */
  #define TIMEOUT 20 /* sec */
  
  /* This defines the `main' function and some more.  */
  #include <test-skeleton.c>
  
  /* These are for the temporary file we generate.  */
  char *name;
  int fd;
  
  void
  do_prepare (int argc, char *argv[])
  {
     size_t name_len;
  
  #define FNAME FNAME2(TRUNCATE)
  #define FNAME2(s) "/" STRINGIFY(s) "XXXXXX"
  
     name_len = strlen (test_dir);
     name = malloc (name_len + sizeof (FNAME));
     if (name == NULL)
       error (EXIT_FAILURE, errno, "cannot allocate file name");
     mempcpy (mempcpy (name, test_dir, name_len), FNAME, sizeof (FNAME));
     add_temp_file (name);
  
     /* Open our test file.   */
     fd = mkstemp (name);
     if (fd == -1)
       error (EXIT_FAILURE, errno, "cannot open test file `%s'", name);
  }
  
  
  int
  do_test (int argc, char *argv[])
  {
    char buf[1000];
    char res[1000];
    int i;
  
    memset (buf, '\0', sizeof (buf));
    memset (res, '\xff', sizeof (res));
  
    if (write (fd, buf, sizeof (buf)) != sizeof (buf))
      error (EXIT_FAILURE, errno, "during write");
  
    for (i = 100; i < 200; ++i)
      buf[i] = i;
    if (PWRITE (fd, buf + 100, 100, 100) != 100)
      error (EXIT_FAILURE, errno, "during %s", STRINGIFY (PWRITE));
  
    for (i = 450; i < 600; ++i)
      buf[i] = i;
    if (PWRITE (fd, buf + 450, 150, 450) != 150)
      error (EXIT_FAILURE, errno, "during %s", STRINGIFY (PWRITE));
  
    if (PREAD (fd, res, sizeof (buf) - 50, 50) != sizeof (buf) - 50)
      error (EXIT_FAILURE, errno, "during %s", STRINGIFY (PREAD));
  
    close (fd);
    unlink (name);
  
    return memcmp (buf + 50, res, sizeof (buf) - 50);
  }
  